Continue wagering according to the pattern until you clear all the numbers in the series. Crossing out the whole system means that you won your desired amount and completed the Labouchere system. You may now write a new sequence and follow these steps to win once again.
You missed out the most important point. You should have said: Continue wagering according to the pattern until you clear all the numbers in the series or, more likely, you run out of money. Given that every casino has a house edge, if you follow this (or any other) system long enough you
will end up at zero.